First code in the Brahma-sūtra is athāto brahma jijñāsā. Brahma-jijñāsā: to inquire about the Absolute. The jijñāsā means inquiry. In the cats' and dogs' life the inquiry is, "Where is food? Where is shelter? Where is sex?" and "Where is defense?" only these four inquiries. The cats and dogs, they are busy, "Where is food? Find out some food." The pig is finding out, "Where is stool? Where is stool?" Here I do not know whether you have got experience. In our country, in the villages, there are so many pigs loitering. They are simply finding out where is stool. In the village the children, they pass stool here and there, and the men, they go to the field and pass, evacuate. So the all these pigs are always loitering there. So they're seeking. The inquiry is for stool. They may take it as food, but after all, it is stool. So according to the body, the different foods are there. That is also described: sāttvika-āhāra, rājasika-āhāra, tāmasika-āhāra. Everything is there in the Bhagavad-gītā.
So in the animal life they are after seeking where is food. Then, as soon as the body is strong, then "Where is sex? Find out the opposite sex." You'll find in the hogs' life very prominent, all these things. For sex they have no discrimination whether it is mother or sister or anyone. You'll find that. These are . . . we have to take lessons from nature's study. The hog is sometimes trying to drink the milk from the breast of the mother and sometimes trying to have sex. You'll find it. This is hog life. This is dog life: no sex discrimination, no food discrimination, no shelter discrimination, no defense discrimination.